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A354623 as a simple table

n a(n)
0 1
1 0
2 2
3 9
4 44
5 390
6 2754
7 32760
8 310064
9 4244184
10 54887400
11 818615160
12 12909921672
13 225872515440
14 4045885572624
15 79360837887240
16 1649832369335040
17 35666417240193600
18 822291935260976064
19 19830352438530840960
20 501144432316767688320
21 13229590606682042436480 

[1,0,2,9,44,390,2754,32760,310064,4244184,
 54887400,818615160,12909921672,225872515440,
 4045885572624,79360837887240,1649832369335040,
 35666417240193600,822291935260976064,
 19830352438530840960,501144432316767688320,
 13229590606682042436480]

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Last modified September 7 10:38 EDT 2024. Contains 375730 sequences. (Running on oeis4.)